Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC

Abstract

In this paper, we investigated the process $pp\to W^{-}hj$ induced by the top-Higgs flavor changing neutral current (FCNC) couplings at the LHC. We found that the cross section of $pp\to W^{-}hj$ mainly comes from the resonant process $pp\to W^{-}t\to W^{-}hq$ due to the anomalous $tqH$ couplings (where $q$ denotes up and charm quarks). We further studied the observability of the top-Higgs FCNC couplings through the process $pp\to W^{-}(\to {\ell }^{-}{\bar{\nu }}_{\ell })h(\to \gamma \gamma )j$ and found that the branching ratios $Br(t\to qh)$ can be probed to $0.16\%$ at $3\sigma$ level at 14 TeV LHC with an integrated luminosity of 3000 fb${}^{-1}$.

14 figures and 2 tables, matches published version

References in corpus (41)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• A minimal set of top-Higgs anomalous couplings
• Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension
• A global approach to top-quark flavor-changing interactions
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Higgs Mediated FCNC's in Warped Extra Dimensions
• Composite Higgs-Mediated FCNC
• Search for New Physics via Single Top Production at the LHC
• Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method
• Anomalous Top-Higgs Couplings and Top Polarisation in Single Top and Higgs Associated Production at the LHC
• Single Top-Quark Production in Flavor-Changing Z' Models
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
• Search for top quark decays $t\to qH$ with $H\to \gamma \gamma$ using the ATLAS detector
• The "Top Priority" at the LHC
• Disentangling Flavor Violation in the Top-Higgs Sector at the LHC
• Search for anomalous single top quark production in association with a photon in pp collisions at sqrt(s) = 8 TeV
• Probing the Top-Yukawa Coupling in Associated Higgs production with a Single Top Quark
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• Combined effects of strong and electroweak FCNC effective operators in top quark physics at the LHC
• R-parity violating effects in top quark FCNC productions at LHC
• Enhancing $thj$ Production from Top-Higgs FCNC Couplings
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings
• Searching for t->c(u)h with dipole moments
• Next-to-leading order QCD predictions for $Z^0{H}^0+\mathrm{jet}$ production at LHC
• Single top quark production at the LHC
• Single top-quark production by strong and electroweak supersymmetric flavor-changing interactions at the LHC
• FCNC-induced heavy-quark events at the LHC from Supersymmetry
• Signatures of NP models in top FCNC decay t --> c(u) l+ l-
• Measuring the W-t-b Interaction at the ILC
• Top quark three-body decays in the R-parity violating MSSM

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• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
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